Technology moves so fast that if you don't keep your hand in then after a year or two you are way behind the times. Especially if you don't work with computers beyond a "Load outlook, load excel, browse net" capacity.
There is no cure other than having a genuine interest in technology as a whole. Things from my point of view have got easier than 10-15 years ago with win95/98/XP. IMO if you knew what you were doing back then then you really should know what you are doing now as half the stuff is done for you. Computers now will last your average user 5+ years from new, with an OS like Win7 there is little to go wrong unless the issue is PICNIC.
I'd say I've always maintained a healthy interest and my career is in I.T so it is easy to keep with the times. I must admit that as long as my home equipment does what I want it to do then I'm pretty happy. I don't have a 1.5k rig for example and don't splash out in certain areas of tech where I can get away with it. (Due to cost and time).